*{
    margin: 0;
    padding: 0;
    box-sizing:border-box;
}

/* 水平垂直居中 */
section{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    background: linear-gradient(to bottom,#f1f4f9,#dff1ff);
}

/* 背景颜色 */
section .color{
    position: absolute;
    filter: blur(200px);
}

section .color:nth-child(1){
    top:-350px;
    width: 600px;
    height: 600px;
    background: #ff359d;
}

section .color:nth-child(2){
    bottom: -150px;
    left: 100px;
    width: 500px;
    height: 500px;
    background: #fffd87;
}

section .color:nth-child(3){
    bottom: 50px;
    right: 100px;
    width: 500px;
    height: 500px;
    background: #00d2ff;
}

.box{
    position: relative;
}

.box .circle{
    position: absolute;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(5px);
    box-shadow: 0 25px 45px rgab(0,0,0,0.2);
    border:1px soild rgba(255,255,255,0.5);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.21);
    border-radius: 50%;
}

.box .circle:nth-child(1){
    top: -50px;
    right: -60px;
    width: 100px;
    height: 100px;
}

.box .circle:nth-child(2){
    top: 150px;
    left: -100px;
    width: 120px;
    height: 120px;
    z-index: 2;
}

.box .circle:nth-child(3){
    bottom: 50px;
    right: -60px;
    width: 80px;
    height: 80px;
    z-index: 2;
}

.box .circle:nth-child(4){
    bottom: 50px;
    left: 100px;
    width: 60px;
    height: 60px;
    z-index: 2;
}

.box .circle:nth-child(4){
    bottom: -70px;
    left: 130px;
    width: 60px;
    height: 60px;
    z-index: 2;
}

/* 登录框样式 */
.container{
    position: relative;
    width: 400px;
    min-height: 400px;
    background: rgba(255,255,255,0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
    box-shadow: 0 25px 45px rgab(0,0,0,0.2);
    border:1px soild rgba(255,255,255,0.5);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.form{
    position: relative;
    width: 100%;
    height: 100%;
    padding: 50px;
}

/* 登录标题样式 */
.form h2{
    position: relative;
    color: #fff;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 5px;
    margin-bottom: 30px;
    cursor:pointer;
}

/* 登录标题下划线样式 */
.form h2::before{
    content: "";
    position: absolute;
    bottom: -5px;
    width: 0px;
    height: 3px;
    background: #fff;
    transition: 0.5s;
}

.form h2:hover:before{
    width: 53px;
}

.form .inputBox{
    width: 100%;
    margin-top:20px;
}

.form .inputBox input{
    width: 100%;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.3);
    outline: none;
    border: none;
    border-radius: 30px;
    border:1px soild rgba(255,255,255,0.5);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 16px;
    letter-spacing: 1px;
    color:#fff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form .inputBox input::placeholder{
    color: #fff;
}

/* 登录按钮样式 */
.form .inputBox input[type="submit"]{
    background: #fff;
    color:#666;
    max-width: 120px;
    margin-bottom: 20px;
    font-weight: 600;
    cursor:pointer;
}

.forget{
    margin-top: 5px;
    color:#fff;
    letter-spacing: 1px;
}

.forget a{
    font-weight: 600;
    text-decoration:none;
    color:#fff;
}

.forget a:hover{
    color:rgba(190,211,53,0.7);
}